Looks like the Faital 18HP1060 in the WiSub is a winner... especially once you get a bit of heat in that coil.... the slight dip in response will fill in some. Try simulating in WinISD, and add around 100C to the driver VC temp.
In stock form maybe.... however when one switches to the tall B body ( Caprice / Impala ) spindle, swaps out the spaghetti- like stamped rear control arms with some DOM tube arms, raise the spring rate ( diesel with A/C coil springs) and use good shocks, and 16" rubber, they CAN handle quite well.'end thread derail'
With the addition of a proper high pass filter @ tuning, your figure of 30 m/ sec should drop considerably. I would shoot for 11 m/sec or lower if possible. This isn't always possible due to the driver parameters and required enclosure size.
Funny thing is when you measure a system that is distorting, the SPL reads higher than it would seem, compared to measuring a system with vanishingly low distortion at the same levels, at least that's what I have found, either that or I 'broke' my meter. Anyone else find this phenomenon? I wonder if it's because the meter is an integrator.... thoughts?
Apply boost 2nd order with a corner of 40 hz. I don't have Audessy on my ancient AVR, so I don't have that issue. The Aura's don't have a lot of mechanical clearance, so you may want to drop on a high pass filter as well, depending on your needs.
3 per chair isn't really ridiculous when you eq up the bottom end to counter the sub 40 hz roll off. I had 4 on a couch frame in push pull, bolted onto opposing sides of a 1 1/2" laminated birch panel, and with eq on the bottom end, it was just enough at moderate levels. The levels need to be carefully set so that they aren't distracting, when balanced they add a greater sense of envelopment.
Before deciding what path to take, you need to know where you stand..... you may have someone close enough to you with a laptop that is fluent in measurement with RoomEq Wizard to help you out. There may be a bunch of issues, especially with the crossover to the mains. ( bookshelves )
I would post your location, and ask if there is anyone around that could help you out..... you never know, some of us AVS'rs will work for beer n' burgers.
Take 30 of these : http://www.parts-express.com/pe/showdetl.cfm?Partnumber=299-028
I am sure you have room for 3 on each chair base. That would give you 12 ohms per chair wired in series. Wire 3 chairs together in parallel and you are back down to 4 ohms.
6 chairs each with 3 shakers in series, would give you (2) 4 ohm loads. ( 3 chairs per channel )
2 amps such as the Inuke 3000 DSP would suffice, and give you the ability to eq up the bottom end of the shakers, since...
I am sure that is a fine case, Thermaltake makes nice stuff. There are many ways to go about browsing your content, ( as I am sure you are aware of ) either locally, a NAS device, or on another computer. To be honest, I would only use a small enough SSD ( 40-80 gb is plenty for most OS ) hard drive for the main operating system, and then have content stored on another device. ( windows share )
This would free up room inside the case for the Mini DSP boards, and room on...
If you have a bit of time on your hands, you could most certainly install one in a nice HTPC case, like the Silvertsone CW 03. Plenty of room, especially if you only use a small ITX based board in the box ( have to make up your own mounting, since the case is built for ATX / Micro-ATX )7 inch touchscreen....